A compact mode-locked diode laser system for high precision frequency comparison experiments / Heike Christopher.

Format:

Book

Author/Creator:

Christopher, Heike, author.

Series:

Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik

Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik ; Volume

Language:

English

Subjects (All):

Diodes.

Lasers.

Physical Description:

1 online resource (209 pages)

Edition:

First edition.

Place of Publication:

Göttingen : Cuvillier Verlag, [2021]

Summary:

Optical frequency combs (OFC) have revolutionized various applications in applied and fundamental sciences that rely on the determination of absolute optical frequencies and frequency differences. The latter requires only stabilization of the spectral distance between the individual comb lines of the OFC, allowing to tailor and reduce system complexity of the OFC generator (OFCG). One such application is the quantum test of the universality of free fall within the QUANTUS experimental series. Within the test, the rate of free fall of two atomic species, Rb and K, in micro-gravity will be compared. The aim of this thesis was the development of a highly compact, robust, and space-suitable diode laser-based OFCG with a mode-locked optical spectrum in the wavelength range around 780 nm. A diode laser-based OFCG was developed, which exceeds the requirements with a spectral bandwidth > 16 nm at 20 dBc, a comb line optical power > 650 nW (at 20 dBc), a pulse repetition rate of 3.4 GHz, and an RF linewidth of the free-running pulse repetition rate < 10 kHz. To realize a proof-of-concept demonstrator module, the diode laser-based OFCG was hybrid-integrated into a space-suitable technology platform that has been developed for future QUANTUS experiments. Proof of sufficient RF stability of the OFCG was provided by stabilizing the pulse repetition rate to an external RF reference. This resulted in a stabilized pulse repetition rate with an RF linewidth smaller than 1.4 Hz (resolution limited), thus exceeding the requirement. The developed diode laser-based OFCG represents an important step towards an improved comparison of the rate of free fall of Rb and K quantum gases within the QUANTUS experiments in micro-gravity.

Contents:

Intro

Abstract

Zusammenfassung

Contents

1. Introduction

1.1. The optical frequency comb

1.2. A tailored optical frequency comb for a spaceborne experiment

1.3. State of the art optical frequency combs operating in thewavelength region around 780 nm

1.4. Thesis organization

2. Mode-locking of semiconductor lasers

2.1. Introduction to mode-locked diode lasers

2.2. Diode laser chips

2.3. Mode-locking techniques

2.4. Optical absorption and gain in passively mode-locked diodelasers

2.5. Resonator concepts for passively mode-locked diode lasers

2.6. Optical components of an ML-ECDL

3. Measurement methods and setup

3.1. Introduction to measurement and analysis feedback loop

3.2. Requirements on the experimental setup and techniques

3.3. Experimental setup

3.4. Experimental techniques

3.5. Performance analysis

3.6. Summary

4. Development of a diode laser-based opticalfrequency comb

4.1. Introduction to the evaluation

4.2. Influence of the laser design parameters on the mode-locking performance

4.3. Influence of the laser operating parameters on the performanceof the best suited device

4.4. Conclusion of the development of the diode laser-based opticalfrequency comb

5. Micro-integration of the diode laser-basedoptical frequency comb generator

5.1. Introduction to the micro-integration concept

5.2. First generation ML-ECDL module

5.3. Advanced ML-ECDL module

5.4. Conclusion from micro-integration of a diode laser-based opticalfrequency comb generator

6. Pulse repetition rate stabilization

6.1. Introduction to stabilization of the pulse repetition rate

6.2. Experimental setup

6.3. Results

6.4. Conclusion from the stabilization of the pulse repetition rate

7. Conclusion and outlook

7.1. Conclusion

7.2. Outlook on future advancements.

A. Derivation of equations

List of Figures

List of Tables

List of abbreviations

List of symbols

Bibliography

List of publications

Acknowledgments

Selbständigkeitserklärung.

Notes:

Description based on publisher supplied metadata and other sources.

Description based on print version record.

Includes bibliographical references.

ISBN:

9783736963993

3736963998

OCLC:

1246577149